uptime is just how long the phone has been on, in seconds. when you restart the phone, that number resets. the app memory is just how much of the internal memory you have left...not storage memory, but it's like RAM, used to let the application function better.

and if you read around, a lot of people have issues with the screen...it is an lcd, so if you press on it, it's going to ripple like that. as for pressing the trackball and having that problem, there may be something misaligned in your particular bold. maybe a few screws too tight, who knows.